If enable Preview Slot of non-default slot in AnimMontage, AnimNotify of AnimationSequence does not run.

UE - Anim - Runtime - Jul 15, 2021

The AnimSingleNodeInstance used in the AnimMontage preview does not consider multiple Slots. The following is a correction code. void UAnimSingleNodeInstance::SetAnimationAsset(class UAnimationAsse ...

Oculus Quest Link with OpenXR fires action events multiple times when multiple action events are bound to the same key

UE - Platform - XR - Jul 14, 2021

From a developer: If the same key is mapped to N action events all the mapped events fire N times. This issue only exists with the OpenXR plugin enabled and does not occur for any keyboard/mouse i ...

Motion Blur Bug on 1st frame of camera change with sequence

UE - Graphics Features - Jul 14, 2021

Renderdoc capture of the blurry frame is here - [Link Removed] It should have symbols attached to it but let me know if not and I can reupload (Jon Cain) It's coming from the motion blur pass but ...

Python Type Hinting

UE - Editor - Workflow Systems - Jul 13, 2021

Goals / Why Type hints allow developers to create self-describing code by statically indicating the type of a value within your Python code.OutcomesBetter documented code for easier reading and debu ...

unreal.py stub can overload IDE parsing limits

UE - Editor - Workflow Systems - Jul 13, 2021

We should consider splitting this into separate per-module files that are merged together via imports. Any strong dependencies (eg, inheritance) need to import the type being inherited. ...

GAME option of GenerateProjectFiles.bat does NOT work properly

UE - Foundation - Cpp Tools - UnrealBuildTool - Jul 13, 2021

if using -GAME option of GenerateProjectFiles.bat, it does not work correctly by the following codes.protected void AddProjectsForAllModules( List<FileReference> AllGames, Dictionary<FileReference, ...

OpenXR Remoting fails to attach actions to remoting session in 4.27

UE - Platform - XR - Jul 13, 2021

Regression from 4.26 where actions fail to bind when remoting in 4.27 Repro: using the Microsoft OpenXR Extensions plugin here:https://github.com/microsoft/Microsoft-OpenXR-Unreal/tree/main/MsftOpe ...

Mobile Previewer: Content Scale Factor 0 Issues

UE - Platform - Apple - Jul 13, 2021

There are several reported issues with Save Zones displays in the mobile previewer when the Mobile Content Scale Factor is set to 0.  When MobileContentScaleFactor is set to 0 a couple things hap ...

Mobile Previewer: Safe Zone Invalid Until Window Resize

UE - Platform - Mobile - Jul 12, 2021

When the Mobile Previewer loads, the Safe Zone widget is not working properly at startup, and requires a window resize to update to the correct Safe Zone. ...

Setting replicated TArray in PostLoad prevents repnotify from being called

UE - Networking - Jul 12, 2021

See linked UDN for more details and a sample project reproducing the issue. The issue seems to be that the object's archetype doesn't have any changes made to the array in PostLoad, so the shadow st ...